Subsequent Events - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified			0 Months Ended		0 Months Ended
	Sep. 30, 2014 Property	Oct. 30, 2014 Subsequent Event Omega	Oct. 01, 2014 Subsequent Event Kentucky	Oct. 01, 2014 Subsequent Event Kentucky Property	Oct. 17, 2014 Subsequent Event Texas	Oct. 17, 2014 Subsequent Event Texas Property
Subsequent Event [Line Items]
Property acquired purchase price			$ 4.6		$ 28.5
Number of properties acquired	313			1		2
Common stock outstanding share to be received upon conversion		0.90